Here’s a quick video by Brian Tittl which illustrates how to add and link to a file through any text area in Moodle (in a web page, label, or course description). An easy way to add new files to any where you can add text in Moodle (if you don’t just want to add it as a resource in a Topic).
Good tip. Direct video link: https://www.youtube.com/watch?v=Fz5dLhqfWNg
